График

#define WIN32_LEAN_AND_MEAN
#include <Windows.h>

#include <map>

HRESULT InitWindow(HINSTANCE, int);
void PrepareGraph();

HWND g_hWnd;
std::map<float, int> g_aGraph;

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE, LPSTR, int nCmdShow)
{
    if (FAILED(InitWindow(hInstance, nCmdShow)))
    {
        MessageBox(NULL, L"Окно каким-то образом не создалось", L"Error!", MB_ICONERROR | MB_OK);
    }
    PrepareGraph();

    MSG msg = { 0 };
    while (WM_QUIT != msg.message)
    {
        if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return (int)msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{


    switch (message)
    {
    case WM_PAINT:
    {
        PAINTSTRUCT ps;
        HDC hdc = BeginPaint(hWnd, &ps);

        // Размеры окна
        RECT rect;
        GetClientRect(hWnd, &rect);
        int width = rect.right;
        int height = rect.bottom;

        HBRUSH hBrush = CreateSolidBrush(RGB(0, 127, 255)); // Синяя кисть
        HPEN hPen = CreatePen(0, 1, RGB(255, 255, 0));// Жёлтый карандаш

        // Задний буффер
        HDC hdcmem = CreateCompatibleDC(hdc);
        HBITMAP hbmBackBuffer = CreateCompatibleBitmap(hdc, width, height);
        SelectObject(hdcmem, hbmBackBuffer);

        // Заполняем задний буфер цветом
        SelectObject(hdcmem, hBrush);
        Rectangle(hdcmem, -1, -1, width+1, height+1);

        // Выбираем цвет линии
        SelectObject(hdcmem, hPen);

        float min = g_aGraph.begin()->first,
            max = g_aGraph.rbegin()->first;

        MoveToEx(hdcmem, (g_aGraph.begin()->first - min)*width / (max - min), double(g_aGraph.begin()->second + 0x80000000) / 0xffffffff * height, nullptr);
        for (const auto& e : g_aGraph)
            LineTo(hdcmem, (e.first - min)*width / (max - min), double(e.second + 0x80000000) / 0xffffffff * height);

        // Переносим всё из заднего буфера на экран
        BitBlt(hdc, 0, 0, width, height, hdcmem, 0, 0, SRCCOPY);

        DeleteDC(hdcmem);
        EndPaint(hWnd, &ps);
    }
        break;

    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }

    return 0;
}

HRESULT InitWindow(HINSTANCE hInstance, int nCmdShow)
{
    WNDCLASSEX wcex;
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    wcex.hIcon = NULL;
    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcex.lpszMenuName = NULL;
    wcex.lpszClassName = L"Graph";
    wcex.hIconSm = NULL;
    if (!RegisterClassEx(&wcex))
        return E_FAIL;

    RECT rc = { 0, 0, 640, 480 };
    AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);
    g_hWnd = CreateWindow(L"Graph", L"График", WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left, rc.bottom - rc.top, NULL, NULL, hInstance, NULL);
    if (!g_hWnd)
        return E_FAIL;

    ShowWindow(g_hWnd, nCmdShow);
    return S_OK;
}

void PrepareGraph()
{
    for (float i = -100; i <= 100; i += 0.1)
        g_aGraph[i] = (sin(i)*(unsigned int(-1)>>1));
}